Sigma C 150-600 mm f/5-6.3 DG OS HSM review - Chromatic and spherical aberration

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Sigma C 150-600 mm f/5-6.3 DG OS HSM

4 May 2015

Arkadiusz Olech

5. Chromatic and spherical aberration

Chromatic aberration

The longitudinal chromatic aberration is corrected by the Sigma very well so it won’t bother you at any focal length. The sample shots, taken at 600 mm and presented below, show that very clearly. Even at the maximum relative aperture it would be difficult to notice any traces of that aberration.

Sigma C 150-600 mm f/5-6.3 DG OS HSM - Chromatic and spherical aberration

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The correction of the lateral chromatic aberration also should be described in positive terms. The graphs below present the performance of the Sigma C 150-600 mm respectively on the APS-C sensor and on full frame.

It’s worth reminding here that we call the chromatic aberration imperceptible up to 0.04% and up to 0.08% it’s level we consider as low. In the case of the Sigma the aberration is higher than 0.08% only at 600 mm and by apertures ranging from f/16 to f/29 so those not especially popular or commonly used. Such a performance can be called only brilliant.

Still, the biggest rival of the Sigma, the Tamron 150-600 mm, had almost identical results in this category. In its case that aberration level exceeded 0.08% at the maximum focal length and only after a significant stopping down.

Canon 5D III, 300 mm, f/11.0	Canon 5D III, 600 mm, f/22.0

Spherical aberration

The Sigma C 150–600 mm f/5–6.3 DG OS HSM corrects the spherical aberration pretty well. There is no “focus shift” effect and the appearance of defocused light points is quite good – images we got in front of and behind the focus are very similar, you cannot find anything disturbing in them.